FFmpeg
roqvideo.c
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1 /*
2  * Copyright (C) 2003 Mike Melanson
3  * Copyright (C) 2003 Dr. Tim Ferguson
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * id RoQ Video common functions based on work by Dr. Tim Ferguson
25  */
26 
27 #include <stdint.h>
28 #include <string.h>
29 #include "roqvideo.h"
30 
31 static inline void block_copy(unsigned char *out, unsigned char *in,
32  int outstride, int instride, int sz)
33 {
34  int rows = sz;
35  while(rows--) {
36  memcpy(out, in, sz);
37  out += outstride;
38  in += instride;
39  }
40 }
41 
42 void ff_apply_vector_2x2(RoqContext *ri, int x, int y, roq_cell *cell)
43 {
44  unsigned char *bptr;
45  int boffs,stride;
46 
47  stride = ri->current_frame->linesize[0];
48  boffs = y*stride + x;
49 
50  bptr = ri->current_frame->data[0] + boffs;
51  bptr[0 ] = cell->y[0];
52  bptr[1 ] = cell->y[1];
53  bptr[stride ] = cell->y[2];
54  bptr[stride+1] = cell->y[3];
55 
56  stride = ri->current_frame->linesize[1];
57  boffs = y*stride + x;
58 
59  bptr = ri->current_frame->data[1] + boffs;
60  bptr[0 ] =
61  bptr[1 ] =
62  bptr[stride ] =
63  bptr[stride+1] = cell->u;
64 
65  bptr = ri->current_frame->data[2] + boffs;
66  bptr[0 ] =
67  bptr[1 ] =
68  bptr[stride ] =
69  bptr[stride+1] = cell->v;
70 }
71 
72 void ff_apply_vector_4x4(RoqContext *ri, int x, int y, roq_cell *cell)
73 {
74  unsigned char *bptr;
75  int boffs,stride;
76 
77  stride = ri->current_frame->linesize[0];
78  boffs = y*stride + x;
79 
80  bptr = ri->current_frame->data[0] + boffs;
81  bptr[ 0] = bptr[ 1] = bptr[stride ] = bptr[stride +1] = cell->y[0];
82  bptr[ 2] = bptr[ 3] = bptr[stride +2] = bptr[stride +3] = cell->y[1];
83  bptr[stride*2 ] = bptr[stride*2+1] = bptr[stride*3 ] = bptr[stride*3+1] = cell->y[2];
84  bptr[stride*2+2] = bptr[stride*2+3] = bptr[stride*3+2] = bptr[stride*3+3] = cell->y[3];
85 
86  stride = ri->current_frame->linesize[1];
87  boffs = y*stride + x;
88 
89  bptr = ri->current_frame->data[1] + boffs;
90  bptr[ 0] = bptr[ 1] = bptr[stride ] = bptr[stride +1] =
91  bptr[ 2] = bptr[ 3] = bptr[stride +2] = bptr[stride +3] =
92  bptr[stride*2 ] = bptr[stride*2+1] = bptr[stride*3 ] = bptr[stride*3+1] =
93  bptr[stride*2+2] = bptr[stride*2+3] = bptr[stride*3+2] = bptr[stride*3+3] = cell->u;
94 
95  bptr = ri->current_frame->data[2] + boffs;
96  bptr[ 0] = bptr[ 1] = bptr[stride ] = bptr[stride +1] =
97  bptr[ 2] = bptr[ 3] = bptr[stride +2] = bptr[stride +3] =
98  bptr[stride*2 ] = bptr[stride*2+1] = bptr[stride*3 ] = bptr[stride*3+1] =
99  bptr[stride*2+2] = bptr[stride*2+3] = bptr[stride*3+2] = bptr[stride*3+3] = cell->v;
100 }
101 
102 
103 static inline void apply_motion_generic(RoqContext *ri, int x, int y, int deltax,
104  int deltay, int sz)
105 {
106  int mx, my, cp;
107 
108  mx = x + deltax;
109  my = y + deltay;
110 
111  /* check MV against frame boundaries */
112  if ((mx < 0) || (mx > ri->width - sz) ||
113  (my < 0) || (my > ri->height - sz)) {
114  av_log(ri->avctx, AV_LOG_ERROR, "motion vector out of bounds: MV = (%d, %d), boundaries = (0, 0, %d, %d)\n",
115  mx, my, ri->width, ri->height);
116  return;
117  }
118 
119  if (!ri->last_frame->data[0]) {
120  av_log(ri->avctx, AV_LOG_ERROR, "Invalid decode type. Invalid header?\n");
121  return;
122  }
123 
124  for(cp = 0; cp < 3; cp++) {
125  int outstride = ri->current_frame->linesize[cp];
126  int instride = ri->last_frame ->linesize[cp];
127  block_copy(ri->current_frame->data[cp] + y*outstride + x,
128  ri->last_frame->data[cp] + my*instride + mx,
129  outstride, instride, sz);
130  }
131 }
132 
133 
134 void ff_apply_motion_4x4(RoqContext *ri, int x, int y,
135  int deltax, int deltay)
136 {
137  apply_motion_generic(ri, x, y, deltax, deltay, 4);
138 }
139 
140 void ff_apply_motion_8x8(RoqContext *ri, int x, int y,
141  int deltax, int deltay)
142 {
143  apply_motion_generic(ri, x, y, deltax, deltay, 8);
144 }
stride
int stride
Definition: mace.c:144
roqvideo.h
out
FILE * out
Definition: movenc.c:54
RoqContext::current_frame
AVFrame * current_frame
Definition: roqvideo.h:44
RoqContext
Definition: roqvideo.h:40
roq_cell::y
unsigned char y[4]
Definition: roqvideo.h:28
RoqContext::avctx
AVCodecContext * avctx
Definition: roqvideo.h:42
ff_apply_motion_8x8
void ff_apply_motion_8x8(RoqContext *ri, int x, int y, int deltax, int deltay)
Definition: roqvideo.c:140
roq_cell
Definition: roqvideo.h:27
block_copy
static void block_copy(unsigned char *out, unsigned char *in, int outstride, int instride, int sz)
Definition: roqvideo.c:31
RoqContext::height
int height
Definition: roqvideo.h:45
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:317
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
ff_apply_vector_2x2
void ff_apply_vector_2x2(RoqContext *ri, int x, int y, roq_cell *cell)
Definition: roqvideo.c:42
roq_cell::v
unsigned char v
Definition: roqvideo.h:29
ff_apply_vector_4x4
void ff_apply_vector_4x4(RoqContext *ri, int x, int y, roq_cell *cell)
Definition: roqvideo.c:72
RoqContext::last_frame
AVFrame * last_frame
Definition: roqvideo.h:43
ff_apply_motion_4x4
void ff_apply_motion_4x4(RoqContext *ri, int x, int y, int deltax, int deltay)
Definition: roqvideo.c:134
roq_cell::u
unsigned char u
Definition: roqvideo.h:29
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:334
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
apply_motion_generic
static void apply_motion_generic(RoqContext *ri, int x, int y, int deltax, int deltay, int sz)
Definition: roqvideo.c:103
RoqContext::width
int width
Definition: roqvideo.h:45